
Originally Posted by
oj88
Radiator caps kasi acts as a pressure release valve. Kung hindi na maganda yung seal (ie. Sira na yung spring or goma), konting taas lang ng water pressure, tapon kagad sa reservoir.
Dapat kasi, mag maintain sya ng pressure according to the value stamped on the radiator cap (ie. 1.1 bar or some other value). Pag lumampas sa 1.1 bar, bubukas na sya para releive yung pressure, then pupunta yung excess sa reservoir. Syempre, pag sira na yung valve, baka .5 bar pa lang, lusot na kagad yung coolant.
Not saying yan yung cause, but it never hurts to check.